Can you crack the unlock code for the lock using the 5 clues below?
- Clue #1:
682
– One number is correct and well placed - Clue #2:
614
– One number is correct but wrongly placed - Clue #3:
206
– Two numbers are correct but both are wrongly placed - Clue #4:
738
– None of the numbers are correct - Clue #5:
780
– One number is correct but wrongly placed
Answer
The code is 042
.
Based on clue #1 and #2, we can say that 6
is not the correct number.
Now we know that the unlock code does not contain 6
and based on clue #3, we know that 2
and 0
are correct numbers but in the wrong position. From clue #1, 2
‘s position should be on the right. The code is ??2
.
Based on clue #5, 0
‘s position should be on the left. The code is 0?2
.
We have to find the missing number in the middle position. Based on clue #2, the middle number has to be 4
. It cannot be 1
, as the statement says that the number is wrongly placed.